Prosthetic knee



FIG. 1 is a front elevational view of a prosthetic knee.

FIG. 2 is a first side elevational view of the prosthetic knee of FIG. 1; and,

FIG. 3 is a second side elevational view of the prosthetic knee of FIG. 1.

The broken lines are included for the purpose of illustrating environmental structure and form no part of the claimed design.

Portions of the prosthetic knee not shown in the drawings are expressly disclaimed and form no part of the claimed design. 

CLAIM The ornamental design for a prosthetic knee, as shown and described. 